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(No Model.)

M. B. PALMER 8v G. S. MUDGE.

PERMUTATION PADLOGK. N0.l 375,565. Patented Dec. Z7, 1887* WITNESSBSATTORNEYS.

NA PETERS, Fhuttrlilhugraphr, Wahingtnn, D. C.

UNITEio` STATES EEicE..

PATENT MARsHALL B. PALMER AND CLARK s.- MUDG-E, or GERMANrowN, NEBRASKA.

eERMUTATloN-PADLOCK.

SPECIFICATIQN forming part of Letters Patent No. 375,505, dated December27, 1887, Application filed OctoberlO, i887. Serial No. 252,889. (Nomodel.)-

To aZZ whom, it may concern:

Be it known that we, MARSHALL `BUR PALMER and CLARK SALATHIEL MUDGE, ofGermantown, in the county of Seward and State of Nebraska, have inventeda new and Improved Permutation-Padlock, of which the following is afull, clear, and exact description.

Ourinvention relates to padlocks, the ob-V ject of the invention beingto provide a permutation-lock which shall be of simple construction, butwhich will be strong, serviceable, and safe in that it cannot betampered with by unauthorized parties. These objects we accomplish bymeans of the novel construction to be hereinafter described, andspecifically pointed out in the claim.

view withone of the outer side plates and its connections removed. Fig.3 is a view ofthe inner face of one of the side plates and itsconnections. Fig. 4 is a perspective view of the bow or shackle which weemploy in connection with our improved form of lock; and Fig. 5 is acentral sectional View of the lock,taken on line a: of Fig. 1.

In constructing such a lock as the one forming the subjectmatter of thisapplication we provide a main frame, 10, the side faces of which arerecessed, as shown at 11, to receive disks 12, that are formedl withslots 13, said slots extending from the peripheral edges of the disksinward toward the centers thereof. These disks 12 are rigidly connected.to or made integral with central pins or posts, 14, that are formedlwith shoulders 15, which shoulders pass outward through side plates,16, that are riveted-to the frame 10.

Against the shoulders 15 of the pins or posts 14 We place washers 17,upon which there are engraved a series of characters, as shown in Fig.1, and upon the outer faces of the side plates, 16, we engrave or markanother series of characters, 18,which characters are arranged betweendividing-lines 19. The washers 17 are held in place by nuts 20, whichare threaded to engage with threads formed upon the extending ends ofthepins or posts 14.

In addition to the recesses 11 of the fraaie 10 said frame is providedwith a central vertical slot or opening in which there is iitted theshank 22 of the bow or shackle 50, said shank 22 being fiat, and beingprovided at its lower end with shoulders 23, which shoulders, when thelock is locked, bear against the pe-` ripheral edges of the disks 12.Above the shank 22 the bow or shackle 50 extends at right anglesthereto, as shown at 21, and from the end of this extending section 21the bow proper extends upward,preferably in a curved line, and thendownward, as in the case of an ordinary shackle, the end of thecurvedseotion ofthe bow being arranged to enter a recess, 26, that is formed"i the frame 10.

In setting the lock the bow or shackle is drawn up to the positionindicated by dotted lines in Fig. 2, and when in this posit-ion theprojections below the shoulders 23 of the shank 22 will enterthe slots13 of the disks 12, said projections thus holding the disks fromturning, so that the washers 17 may, by means of tongs, pinchers,pliers, or other properimplement, be turned to bring any desired markupon the washers into register with any desired mark upon the sideplates of the lock. The' registering characters or marks are thencarefully noted in order that the lock may be opened after the bow orshackle has been returned to the position in which it is shown in Figs.1, 2, and 5; for, by bringing the marks or characters into register, theslots 13 of the disks 12 will be brought directly above the shoulders 23of the shank 22,` and thc shackle may be once more drawn up to theposition indicated by dotted lines in Fig. 2, thus providing for theintroduction or the withdrawal of a staple within or from the curvedsection of the bow or shackle.

Although any number of characters might be engraved upon the washers 17,we find it convenient in practice to provide said washers with fifteencharacters; and, although any number of characters might'be engravedupon the plates 16, we prefer to provide said plates with sixteencharacters, that are separated by graduating lines or marks, asindicated in Fig. 1.

Vith such alock as the one above described it will be almost impossiblefor an intruder to open the lock unless the combination of both washersand plates is known to him.

Having thus fully described ourinvention, we claim as new and desire tosecure by Letters Patent-w Y In a permutationvpadlock,the combination,with a main frame formed with recesses 1L and a central longitudinalslot, of disks 12, which iit within the recesses l1, said disks beingformed with slots 13, pins or studs 14., extending outward from thedisks and formed with shoulders 15, charaelerbeari n g plates 1G,

that are connected to the frame and through which pins or studs extend,character-bearing washers 17, nuts 20, which hold the washers againstthe shoulders 15, and abow or shackle, 50, formed with a shank, 22, atthe lower end ot' which there are shoulders 23, said shank being ittedwithin the central slot of the main frame of the loek,while the end 0fthe curved section of the bow is arranged to entera recess formed in themain frame, substantially as described.

MARSHALL B. PALMER. CLARK S. MUDGE. lVitnesses:

J. N. XVILLIAMs, 1%.-13. IUm'is.

